I think there was an expectation in the 70s of ‘the next kind of music’, ...‘the next big thing’.
When it didn’t come, some (West Coast) musicians said “So are we just going to re-hash the whole f-ing thing again? …We hope not!â€.
It was expected, because it had been happening that way up until that time. There had been some radical changes in music all the way back since before ragtime at the turn of the previous century (1900).
But it didn’t come. Instead there were little side-roads explored, funk & punk etc. None of those things were radically different, and none of them replaced rock. Punk was a crude cartoon of rock. Funk blended soul and moved forwards about 3 inches and gave up.
Reggae was different, but it was not universal enough & didn’t replace rock either. It co-existed for a while, like soul has done.
Computer music (techno etc) use a different means of production and new voices, but the form is still old school.
So 40 years on and there is still no ‘next big thing’, just endless sub-divisions of rock & soul.
Creativity is out there, but there is a stagnation of form. We did just re-hash the whole f-ing thing again and again.
The annoying thing used to be the media moguls being stuck in this rut of looking to youth for the ‘next thing’ and coming up empty. Now they have given up entirely and reverted back to the glorification of show-biz. I think that right now is very similar thing to the 1940’s approach.
Curiously though, it was that ‘endless stream of sh*t’ (quote- David Crosby) that presaged the birth of rock & roll in the 1st place.